title: Linear and spiral forms of longitudinal cuts in graphitized N-doped multiwalled carbon nanotubes (g-N-MWCNTs).
abstract: Nitrogen-containing multiwalled nanotubes (N-MWCNTs), formed by CVD from a nitrogen-containing feedstock have a 'bamboo' structure in which the axes of the graphene planes are not parallel to the axis of the nanotube and the core is periodically bridged. We find that thermal and chemical treatment of these materials can produce nanotubes that have been cut longitudinally in either a linear or in a spiral manner. In addition, these longitudinally cut nanotubes can be partially or fully unrolled by sonication in an aqueous surfactant, producing graphite platelets as well as narrow structures that could be thin graphite ribbons or very narrow, intact N-MWCNTs. These different morphologies of graphite, available from one source, suggest that there are multiple structures of N-MWCNTs present, few as simple as stacked cups or nested scrolls.
authors.affiliation: Department of Chemistry and Center for Applied Energy Research, University of Kentucky, Lexington, KY 40506, USA. meier@uky.edu
authors.forename: Mark S
authors.initials: MS
authors.lastname: Meier
authors.forename: John P
authors.initials: JP
authors.lastname: Selegue
authors.forename: Kelby B
authors.initials: KB
authors.lastname: Cassity
authors.forename: Aman Preet
authors.initials: AP
authors.lastname: Kaur
authors.forename: Dali
authors.initials: D
authors.lastname: Qian
mesh_terms: D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D009584:Nitrogen / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D037742:Nanotubes, Carbon; D009584:Nitrogen